State laws are very strict about licensed caregiver-to-child ratios. Caregiver-to-child ratios depends upon age of caregiver, age of children and size of group. Unfortunately, laws are less clear about caregiver-to-child ratios for at-home babysitting. Here are babysitting guidelines about how many children to have in care, babysitting ages and length of time kids can be home alone. Babysitting age requirements, caregiver-to-child ratios, home alone rules | Examiner.com